In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

A magical sinkhole on the Yucatán Peninsula is adorned with mini waterfalls and hanging vines.

A little sculpture with a large wardrobe.

Cozy basement bar sports an inventory of over 2,000 beers.

A historic beacon built in the aftermath of the worst maritime disaster on the Great Lakes.

Recognized the world over as the home of the McCallisters in the 1990 movie "Home Alone."

The only Bahá'í house of worship in North America and one of only a handful worldwide.

Affectionately known as "Lord Bot," this historic statue has a cult social media following and rightly claims to be “the most metal inhabitant of the Wren Yard.”

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Construction of Barcelona’s iconic (but controversial) church was finally completed in 2026—a century after the death of its architect.

Limestone caves with spectacular showcase chambers.

Every equinox this Maya pyramid puts on a spooky ancient light show.

The deepest sinkhole in Central Europe comes with a grisly tale and an unusual nickname: “The Stepmother Abyss.”

Synagogue built from the stones of Solomon's temple contains the golem of Prague.

A 400-year-old mummified arm dangles from the ceiling of St. James the Greater, serving as a warning to thieves.

Be(w)ar(e) the moat around this historic Czech castle.

A subterranean house of worship carved right out of the bedrock.

Experience what life was like in Ireland during the Viking and medieval ages.

This kitsch eatery is chock-a-block with bric-a-brac.

Replicas of Apollo's leonine stone guard cats still line a sacred row in Greece.

Giant marble phalluses on the sacred island of antiquity.

Scattered throughout London are ancient remnants of the city's former bounding wall.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.